What is CVE-2022-39356?

CVE-2022-39356 is a high-severity vulnerability in Discourse, classified under Improper Authorization. CVSS score: 8.9/10. Published 2022-11-02.

How severe is CVE-2022-39356?

High severity. CVSS v3 base score is 8.9 out of 10.

Auth bypass in Discourse

CVE-2022-39356

Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is temporarily disabling invitations with `SiteSetting.max_invites_per_day = 0` or scope them to individual email addresses.

EPSS: 0.006 (43.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L.

Affected products

Discourse — versions <= 2.9.0.beta10, <= 2.8.9, 2.9.0

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

security-advisories@github.com (Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-39356?: CVE-2022-39356 is a high-severity vulnerability in Discourse, classified under Improper Authorization. CVSS score: 8.9/10. Published 2022-11-02.
How severe is CVE-2022-39356?: High severity. CVSS v3 base score is 8.9 out of 10.